<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        *{
            padding: 0;
            margin: 0;
        }
        ul{
            list-style: none;
        }
        .box{
            width: 200px;
            height: 180px;
            padding-left: 20px;
            background-color: seashell;
        }
        ul{
            position: relative;
        }
        li{
            margin-top: 20px;
        }
    </style>
</head>
<body>
    <div class="box">
        <ul>
            <li><input type="text" placeholder="请输入用户名"></li>
            <li><input type="password" placeholder="请输入密码"></li>
            <li><button>点击登录</button></li>
        </ul>
    </div>
</body>
</html>